How does silicone defoaming agent achieve the defoaming process?
Bubbles are a common phenomenon in our lives, but foam forms when a large number of bubbles gather and are continuously distributed in a liquid. A large amount of foam exists in life and production, which not only affects the normal progress of work, but also causes certain pollution to the environment, so eliminating foam is a very necessary task.
Under normal circumstances, in order to quickly achieve defoaming, most companies will add defoaming agents for defoaming. However, there are many types of defoaming agents, so I will use silicone defoaming agents as an example to introduce silicone defoaming agents to you. Defoaming process and principle of foaming agent.
How does silicone defoaming agent achieve the defoaming process? What is the principle?
After the silicone defoamer is added to the foaming system, it can be quickly dispersed, and the surfactant molecules are directionally arranged on the surface of the bubbles. When the silicone defoamer reaches a certain concentration and there are enough surfactant molecules, A thin film will be formed on the bubble wall and its surface tension will be reduced, thereby increasing the gas-liquid contact surface and ultimately making the formed bubbles less likely to merge and burst.
Since the bubble film exposed to the air has a bimolecular film structure, if you want to eliminate the foam, you must destroy and inhibit the formation of the film between the gas and liquid. Therefore, the added silicone defoamer must be able to quickly spread on the surface of the solution and enter the foam. The bimolecular oriented film destroys the mechanical balance of the film, thereby achieving the purpose of defoaming.
For general organic compounds, their spreading coefficients are very small and they are also inert in chemical properties. Therefore, pure silicone oil cannot be used as a defoaming agent. However, after emulsifying it to form a silicone defoaming agent, it can be used on the surface of the solution. Spread quickly, and use less amount to achieve a lot of good defoaming effects.
Shibang Jiaming Recommended Products:
BZ-401 Organosilicon defoamer additive
Composition: Modified silicone compounds
Typical physical data
Appearance: transparent colorless to slightly yellow liquid
Active ingredient: 1%
Solvent: Xylene, Butyl ester
Application scope: Suitable for: solvent-borne coatings; recommended for: light-curing coatings, solvent-free coatings.
Recommended dosage: 0.1-1.0% of the total formula (please test the most appropriate dosage before use).
Dosage: In order to obtain sufficient defoaming effect, it is recommended to add before grinding. If added later, it should be mixed under high enough shear force to ensure good distribution of defoamer.
Characteristics and advantages:
Good compatibility with various resin systems, with excellent defoaming and bubble-breaking effect, can eliminate the bubbles generated during the production, canning and construction of coatings, especially for the two-component coating reaction bubbles generated by the defoaming effect is extremely significant, to prevent the generation of pinholes and so on.
Packing:25KG non-recycled blue pail.
Before the product is completely empty, the lid must be tightly closed after use.
Storage: Keep away from heat and light source and keep away from light.
Precautions: Please carefully evaluate the effect on compatibility and shrinkage before use.
The above information is based on the product, due to the producer’s formula, production process, construction conditions are different, the above statements are for reference only.
The company does not assume any legal responsibility, please test the dosage before use.
The company has the right to improve its own products, any changes in its specifications, without prior notice.
